A new study finds that older firefighters may show signs of long-term heat adaptation.

Older firefighters who are exposed to heat stress on their work could be more heat resilient over time. A study published in the Journal of Occupational and Environmental Hygiene (JOEH) found that older firefighters may be more tolerate to hot working conditions, compared to workers, who are not heat-exposed. The older firefighters, who seems to be adapted feel affected by the heat at a later time.

The study says, that although the Non-Firefighters and Firefighters demonstrate similar cardiovascular and hydration responses during moderate-to-heavy intensity exercise within each of the thermal conditions, the attenuated thermal effects between the two heat stress conditions in the Firefighters suggests a protective adaptation.